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一、白点病(刺激隐核虫病)l、病原:刺激隐核虫,又称“海水鱼小瓜虫”,属纤毛动物门小瓜虫类。虫体为卵圆形或球形,全身表面有均匀一致的纤毛。2、发病症状:虫体主要寄生在大黄鱼的体表、鳃和鳍条上。发病初期,肉眼可见病鱼尾鳍和胸鳍上有白点,随着病情发展逐渐扩展到体表和鳃部,白点增多形成一层膜,俗称“白点病”。病鱼急躁不安,或沿池壁游动,或跳跃窜出水面,或往池壁上冲撞摩擦,严重时鳞片脱落、肌肉发炎、溃烂,眼睛白浊、食欲下降、身体消瘦、行动迟缓,最后因鳃组织被严重破坏,呼吸困难,窒息死亡。
First, the white spot disease (stimulating cryptosporidiosis) l, pathogen: to stimulate Cryptocaryon, also known as “sea fish small melon”, is a small ciliate insects cilia. The worm body is oval or spherical, the body surface has a uniform cilia. 2, the incidence of symptoms: the main parasitic parasites in the body surface of large yellow croaker, gills and rays. Early onset, macroscopically visible disease Caudal fin and pectoral fins have white spots, with the progression of the disease gradually expanded to the surface and gills, white spots increase the formation of a layer of membrane, commonly known as “white spot disease.” Sick fish restlessness, or swimming along the pool wall, or jumping out of the water, or to the pool wall collision friction, scales flake off, muscle inflammation, ulceration, cloudy eyes, loss of appetite, weight loss, slow, and finally Due to the gill tissue is severely damaged, breathing difficulties, suffocation death.